A physical identification data (PID) addressing method using a wobble signal, a wobble address encoding circuit, a method and circuit for detecting the wobble address and a recording medium therefor. A wobble signal obtained by phase modulating address information indicating the physical identification information and a wobble signal having only a simple carrier are recorded in each groove track by way of time division multiplexing. Groove tracks are divided into odd groove tracks and even groove tracks, and a wobble carrier and wobble address information are alternately recorded in each groove track and between odd and even groove tracks such that the wobble address information is not recorded in a section of an even groove track corresponding to a section of an odd groove track in which the wobble address information is recorded. Therefore, interference between wobble signals of adjacent tracks can be removed, and a method and a circuit for detecting a wobble address can be simplified.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of addressing physical identification data using a wobble on an optical recording medium, the method comprising: alternately recording a simple wobble carrier and address information in one of a groove track and a land track, the address information being phase modulated with two phases having a phase difference therebetween using the simple wobble carrier, wherein the simple wobble carrier is recorded in an adjacent track corresponding to a section in which the phase modulated address information is recorded.
2. The method of claim 1 , wherein the two phases having the phase difference therebetween are 0 and 180 degrees, or 90 and 270 degrees.
3. The method of claim 1 , wherein the two phases are set such that the difference between the two phases is less than a maximum possible phase difference.
4. The method of claim 1 , wherein the alternately recording comprises: repeatedly recording the phase modulated address information, indicating the physical identification data, and the simple wobble carrier in each groove track to be time division multiplexed, the groove tracks are divided into odd groove tracks and even groove tracks, and alternately recording the wobble carrier and the phase modulated address information in each groove track and between odd and even groove tracks such that the phase modulated address information is not recorded in a section of an even groove track corresponding to a section of an odd groove track in which the phase modulated address information is recorded.
5. The method of claim 1 , wherein the phase modulated address information comprises address information of a current track and wobble address information of an adjacent track.
6. The method of claim 1 , further comprising recording information for synchronizing an initial phase of a wobble signal in each predetermined unit in each track of the optical recording medium.
7. The method of claim 1 , wherein the one groove or land track comprises minimum recording units, and the method further comprising repeatedly recording the phase modulated address information three or more times in each of the minimum recording units.
8. The method of claim 1 , wherein the phase modulated address information comprises a wobble sync having synchronization information for determining a beginning of physical identification data, the physical identification data being phase modulated with the wobble carrier having address information and is multiplexed with the wobble carrier in a predetermined time interval, and an error detection code.
9. The method of claim 8 , wherein a period of the physical identification data is equal to or larger than a period of the wobble carrier and smaller than four times the period of the wobble carrier.
10. The method of claim 8 , wherein a period of the wobble carrier is larger than 50 times a period of channel data and smaller than 450 times the period of the channel data, the channel data being actually recorded on the optical recording medium.
11. The method of claim 8 , wherein the wobble sync is detectable in a modulated state and/or after demodulation.
12. The method of claim 8 , wherein the wobble sync comprises a pseudo random sequence.
13. The method of claim 12 , wherein the wobble sync comprises a Barker-Code.
14. The method of claim 1 , further comprising recording a sector mark at a beginning of a minimum recording unit in each track of the optical recording medium.
15. The method of claim 14 , wherein the optical recording medium comprises odd groove and land tracks and even groove and land tracks, and structures of the sector mark are different in the even groove and land tracks as opposed to the odd groove and land tracks, and a structure of a first sector mark of each track is different from the structure of any of the other sector marks in the same track.
16. The method of claim 15 , wherein the sector mark of each of the even groove and land tracks comprises a mirror zone, a track mark having information for discriminating an even track from an odd track, and a variable frequency oscillator (VFO) signal having phase synchronization information, and the sector mark of each of the odd groove and land tracks comprises the mirror zone, another mirror zone and the VFO signal.
17. The method of claim 15 , wherein the first sector mark of each of the even groove and land tracks comprises a mirror zone, a track mark, another mirror zone, another track mark and a VFO signal, and the first sector mark of each of the odd groove and land tracks comprises the mirror zone, the track mark, another mirror zone, still another mirror zone and the VFO signal.
18. A method of detecting a wobble address from an optical recording medium, in which a simple wobble carrier and address information, which is phase modulated with two phases having a phase difference therebetween using the simple wobble carrier, are alternately recorded in one of a groove track and a land track, and the simple wobble carrier is recorded in a section of an adjacent track corresponding to a section in which the phase modulated address information is recorded in a current track, in an optical recording and reproducing system having an optical detecting device, the method comprising: recovering the simple wobble carrier from a sum of a sum signal and a push-pull signal of radially half-divided output signals of the optical detecting device; providing an output signal having an original signal component and a harmonic component by multiplying the push-pull signal by the wobble carrier; and removing the harmonic component from the output signal and demultiplexing the original signal component to recover the address information.
19. The method of claim 18 , wherein the demultiplexing comprises demultiplexing an odd groove address if the one groove or land track is an odd groove track, demultiplexing an even groove address if the one groove or land track is an even groove track, and demultiplexing an odd groove address and an even groove address if the one groove or land track is the land track, to recover groove address information land address information.
20. The method of claim 18 , further comprising discriminating the groove track from the land track based on which of the address information and a zero signal indicating the wobble carrier is first recovered.
21. A circuit for encoding an address using a wobble in an optical recording and reproducing system, the circuit comprising: a generator which generates a wobble signal having only a simple carrier; a phase modulator which phase modulates address information indicating physical identification data with two phases of the wobble signal having a phase difference; and a time division multiplexer which time division multiplexes the wobble signal and the phase modulated address information in one of a groove track and a land track of an optical recording medium, in a predetermined time interval such that the simple wobble carrier in a section of an adjacent track corresponding to a section in which the phase modulated address information is recorded in a current track.
22. The circuit of claim 21 , wherein the two phases have a maximum phase difference therebetween and are 0 and 180 degrees, or 90 and 270 degrees.
23. The circuit of claim 21 , wherein the two phases have a phase difference which is less than a maximum possible phase difference.
24. The circuit of claim 21 , wherein the address information includes the address information of the current track, and the address information of the adjacent track.
25. The circuit of claim 21 , wherein the time division multiplexer repeatedly records the phase modulated address information three or more times in minimum recording units on the optical recording medium.
26. The circuit of claim 21 , wherein the phase modulated address information comprises a wobble sync having synchronization information for determining a beginning of the physical identification data, physical identification data being phase modulated with the wobble carrier having address information and multiplexed with the wobble carrier in a predetermined time interval, and an error detection code.
27. The circuit of claim 26 , wherein a period of the physical identification data is equal to or larger than a period of the wobble carrier and smaller than four times the period of the wobble carrier.
28. The circuit of claim 26 , wherein a period of the wobble carrier is set to be larger than 50 times a period of channel data and smaller than 450 times the period of the channel data, the channel data being recorded on the optical recording medium.
29. The circuit of claim 26 , wherein the wobble sync is detectable in a modulated state and/or after demodulation.
30. The circuit of claim 26 , wherein the wobble sync comprises a pseudo random sequence.
31. The circuit of claim 30 , wherein the wobble sync comprises a Barker-Code.
32. The circuit of claim 21 , wherein a sector mark is recorded at a beginning of a minimum recording unit in each track the optical recording medium during mastering of the recording medium.
33. The circuit of claim 32 , wherein the optical recording medium comprises odd groove and land tracks and even groove and land tracks, and structures of the sector marks are different in the even groove and land tracks as opposed to the odd groove and tracks, and the structure of a first sector mark of each track is different from the structure of any of the other sector marks in the same track.
34. The circuit of claim 33 , wherein the sector mark of each of the even groove and land tracks comprises a mirror zone, a track mark having information for discriminating an even track from an odd track, and a variable frequency oscillator (VFO) signal having phase synchronization information, and the sector mark of each of the odd groove and land tracks comprises the mirror zone, another mirror zone and the VFO signal.
35. The circuit of claim 33 , wherein a first sector mark of each of even groove and land tracks comprises a mirror zone, a track mark, another mirror zone, another track mark and a VFO signal, and a first sector mark of each of the odd groove and land tracks comprises the mirror zone, the track mark, another mirror zone, still another mirror zone and the VFO signal.
36. A circuit for detecting a wobble address from an optical recording medium, in which a simple wobble carrier and address information, which is phase modulated with two phases having a phase difference therebetween using the simple wobble carrier, are alternately recorded in one of a groove track and a land track, and the simple wobble carrier is recorded in a section of an adjacent track corresponding to a section in which the phase modulated address information is recorded in a current track, in an optical recording and reproducing system having an optical detecting device, the circuit comprising: a wobble clock recoverer which detects a wobble clock signal from a sum of a sum signal and a push-pull signal of radially half-divided output signals of the optical detecting device; a phase demodulator which provides an output signal having an original signal and a harmonic component by multiplying the push-pull signal by the wobble clock signal; and a demultiplexer which low pass filters the harmonic component from the output signal and demultiplexes an original signal component having a phase component to recover the address information.
37. The circuit of claim 36 , wherein the demultiplexer demultiplexes an odd groove address if the one groove or land track is an odd groove track, demultiplexes an even groove address if the one groove or land track is an even groove track, and demultiplexes the odd groove address and the even groove address if the one groove or land track is the land track, thereby recovering groove address information or land address information.
38. A recording medium employing a groove and land recording method, comprising: land and groove tracks; and a simple wobble carrier and address information alternately recorded in one of the groove tracks or one of the land tracks, the address information being phase modulated with two phases having a phase difference therebetween using the simple wobble carrier, and the simple wobble carrier is recorded in a section of an adjacent track corresponding to a section in which the phase modulated address information is recorded in a current track.
39. The recording medium of claim 38 , wherein the two phases have a maximum phase difference therebetween of 0 and 180 degrees, or 90 and 270 degrees.
40. The recording medium of claim 38 , wherein the two phases have a phase difference which is less than a maximum possible phase difference.
41. The recording medium of claim 38 , wherein the phase modulated address information and a wobble signal having only the simple wobble carrier are repeatedly recorded in each groove track to be time division multiplexed, the groove tracks being divided into odd groove tracks and even groove tracks, and the wobble signal and the phase modulated address information are alternately recorded in each groove track and between the odd and even groove tracks.
42. The recording medium of claim 38 , further comprising an area which synchronizes an initial phase of the wobble signal in each of predetermined units in the groove track or the land track.
43. The recording medium of claim 38 , wherein the phase modulated address information comprises address information of the current track and address information of the adjacent track.
44. The recording medium of claim 38 , wherein the one groove or land track comprises minimum recording units and the phase modulated address information is repeatedly recorded three or more times in each of the minimum recording units.
45. The recording medium of claim 38 , wherein the phase modulated address information comprises a wobble sync having synchronization information for determining a beginning of physical identification data, the physical identification data information being phase modulated with the wobble carrier having address information and is multiplexed with the wobble carrier in a predetermined time interval, and an error detection code.
46. The recording medium of claim 45 , wherein a period of the PID is equal to or larger than a period of the wobble signal and smaller than four times the period of the wobble signal.
47. The recording medium of claim 46 , wherein a period of the wobble signal is set to be larger than 50 times a period of channel data and smaller than 450 times the period of the channel data, the channel data being recorded on the recording medium.
48. The recording medium of claim 45 , wherein the wobble sync is detectable in a modulated state and/or after demodulation.
49. The recording medium of claim 45 , wherein the wobble sync comprises a pseudo random sequence.
50. The recording medium of claim 49 , wherein the wobble sync comprises a Barker-Code.
51. The recording medium of claim 38 , wherein a sector mark is disposed at a beginning of a minimum recording unit in each track of the optical recording medium.
52. The recording medium of claim 51 , wherein the optical recording medium comprises odd groove and land tracks and even groove and land tracks, and structures of the sector marks are different in the even groove and land tracks as opposed to the odd groove and land tracks, and the structure of the first sector mark of each track is different from a structure of any of the other sector marks in the same track.
53. The recording medium of claim 52 , wherein the sector mark of each of the even groove and land tracks comprises a mirror zone, a track mark having information for discriminating the even track from the odd track, and a variable frequency oscillator (VFO) signal having phase synchronization information, and the sector mark of each of the odd groove and land tracks comprises the mirror zone, another mirror zone and the VFO signal.
54. The recording medium of claim 52 , wherein a first sector mark of each of the even groove and land tracks comprises a mirror zone, a track mark, another mirror zone, another track mark and a VFO signal, and a first sector mark of each of the odd groove and land tracks comprises the mirror zone, the track mark, another mirror zone, still another mirror zone and the VFO signal.
55. The circuit of claim 21 , wherein the time division multiplexer comprises: a divider to divide the wobble signal, to generate a multiplexed period; an inverter to invert the multiplexed period; a first selector which selectively enables transmission of the multiplexed period and the inverted multiplexed period based upon an odd/even groove determination signal, to generate a selection control signal; and a second selector which selectively enables transmission of the wobble signal and the phase modulated address information based upon the selection control signal.
56. The circuit of claim 55 , wherein the address information is 1 or 1 .
57. The circuit of claim 55 , wherein the second selector first selects the wobble signal and then repeatedly selects the phase modulated address information and the wobble signal if a current track is an odd groove track, and the second selector first selects the phase modulated address information and then repeatedly selects the wobble signal and the phase modulated address information if a current track is an even groove track.
58. The circuit of claim 36 , wherein the wobble clock recoverer comprises: a bandpass filter which filters the push-pull signal; an envelope detector which detects an envelope of the sum signal; an adder which adds the filtered push-pull signal and the envelope, to generate an added signal; and a phase locked loop circuit which detects the wobble clock signal from the added signal; wherein the phase demodulator generates the output signal having the original signal and the harmonic component by multiplying the filtered push-pull signal by the wobble clock signal.
59. The circuit of claim 58 , wherein the demultiplexer outputs odd address information as the address information if a current track is an odd groove track, even address information as the address information if the current track is an even groove track, and outputs multiplexed odd and even address information if the current track is a land track.
60. The circuit of claim 38 , wherein the two phases have a phase difference of 45 and 90 degrees.
61. A method of address physical identification data on a recording medium, comprising: generating a simple wobble carrier; phase modulating address information based upon phases of the simple wobble carrier; and time division multiplexing the simple wobble carrier and the phase modulated address information according to either a groove track or a land track of the recording medium.
62. The method of claim 61 , wherein the time division multiplexing comprises time division multiplexing the simple wobble carrier and the phase modulated address information using a variation of both walls of the groove track or the land track of the recording medium.
63. A recording medium comprising: land tracks; groove tracks; a simple wobble carrier; and phase modulated wobble information which is phase modulated according to phases of the simple wobble carrier; wherein the simple wobble carrier and the phase modulated wobble information are time division multiplexed into one of the land tracks or one of the groove tracks.
64. The recording medium of claim 63 , wherein the simple wobble carrier and the phase modulated address information are time division multiplexed into both walls of the one land or groove track.
65. The method of claim 1 , wherein a period of the phase modulated address information is at least longer than a period of the simple wobble carrier.
66. The method of claim 1 , further comprising: detecting the two phases by multiplying the phase modulated address information by the simple wobble carrier, and detecting a size of the multiplied signal in a predetermined period.
67. The method of claim 1 , wherein the land or groove track is divided into error correction blocks each comprising a plurality of sectors, wherein a size of each sector is 4, 8 or 16 Kbytes and a size of the error correction block is 32 Kbytes.
68. The method of claim 61 , wherein the phase modulated address information is 1-bit data.
69. The method of claim 61 , wherein the phase modulated address information is multi-bit data.
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November 3, 2000
September 14, 2004
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